Improvement in street-sewers



der side view of the curb-plate.

UNITED STATES PATENT OFFICE.

JOHN MYERS AND GEORGE ELBREG, OF CINCINNATI, OHIO.

IMPROVEMENT IN STREET-SEWERS.

Speccation forming part of Letters Patent No. 33,538, dated October 22, 1861.

To all whom t r11/ay concer-lt:

Be it known that we, JOHN MYERS and GEORGE ELBREG, both of Cincinnati, Hamilt0n county, Ohio, have invented a new and useful Improvement in Street-Servers; and we do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the annexed drawings, making part of this specification.

Our invention relates to a system of selfclosing traps or doors for the inlets of streetsewers, said traps bein gadapted to open either partially or altogether, according to the volurne of the current, and when shut to confine the exhalations within the sewer, thus dispensing with the usual wells or watertraps, which are nearly useless from their liability to iid up and their incapacity for closing the entire sewer.

Figure l is a perspective view of a sewerinlet with ourimprovement. Fig. 2 is an un- Fig. 3 is a modification of our corner-piece.

A represents a portion ot' pavement. near the inlet.

B is an iron curb-plate.

C are the Walls of the shaft.

D is a culvert.

The inner Walls c of the shaft slope inwardly as they descend, so as to form inclined seats for doors E E of the represented trapezoidal shape. These doorsEE are hinged at e by their longest edge to the under side of thecurb-plate B. Hinged at f to the curb-plate B, between and slightly in rear of doors E and E', is a third door F, formed of two trapezoidal plates united at right angles. This door F, or corner-piece, serves to close the vacancy created by the peculiar shape ot' the doors E E whenever the trap is shut, but yields'in common with said doors to any unusual dood from the gutter. The trapezoidal form ot' the doors E E allows them to swing inwardly to any extent without obstructing each others movements, and each door E or E is capable of swinging independently of the corner-piece or ot' the other, so'thata stream entering one only is not required to lift the entire set of doors. It will further be seen that the entire trap, including the corner-piece, is capable of opening completely around from c to c, so as to leave an ample, single, and unobstructed passage to any'considerable Hood.

Fig. 3 represents a corner-piece formed ot' two leaves F F', hinged to the corner-post H, and held to their seats by a springl or by their weight alone.

We claim as new and of our invention- The arrangement of doors E E', yielding corner-piece F', curb B, and inclined seats c, or equivalent devices, for the automatic closing ot sewer-inlets without obstructing the passages thereof, in the manner set forth.

In testimony ot' which invention We hereunto set our hands.

JOHN MYERS. GEORGE ELBREG. Witnesses:

GEO. H. KNIGHT, WM. EATON. 

